New to the Forum and to PIC's - Electronic Circuits Projects Diagrams Free

psapg · 24th June 2007, 05:26 PM

Hi guys!!!!

Although I have some experience with electronic and it's basic theories, I've never worked with PIC's before...
Now I'm willing to try and chose a "Garage opener" alike project....
My goal is to, by pressing a single press-button, a dc motor(6v or 12V) woul carrya a small load (about 50g) from A to B and Stop, and reverse in the next key press....
Since I do some programing in a Basic alike programing enviroment for the Windows Mobile Platform, I was planig in using PIC-Basic for the code....

What PIC shoul I use? (is 16c54 suited ?)
Any related circuits I should peek?
Should I use a H-Bridge for the motor?
End-of-travel switch: micro-switch or opto-barrier?

Thanks for all your incoming imput...

Paulo Gomes

eng1 · 24th June 2007, 05:33 PM

The PIC16C54 is an OTP device. This means that it can't be re-programmed/updated after its first programming. Choose a flash-based PIC!

psapg · 24th June 2007, 05:45 PM

Thanks, Eng1

Any suggestions? I believe I only need 5 I/O pins, 1 for the press button, one for each sposition sensor and two for the H-Bridge...

mvs sarma · 24th June 2007, 05:54 PM

Quote:

Originally Posted by psapg

Thanks, Eng1

Any suggestions? I believe I only need 5 I/O pins, 1 for the press button, one for each sposition sensor and two for the H-Bridge...

best is to go for a popularly used device as they wold be cheaper. use as many pins as you need. always go for flash series as suggested ny Eng1. one such is 16F628-4 and try practicing the specifics of this chip as it has adc input pins etc.

we could have suggested 16f84-4 but these might go off the shelves

eng1 · 24th June 2007, 05:55 PM

Maybe you'll add some LEDs?

I would consider a PIC16F628A.

psapg · 24th June 2007, 06:34 PM

NO, I wasn't planig on using Leds other that the opto-couplers, if I decide to go with them..

Any caution/example on using these as input to the PIC?

**Nigel Goodwin** · 24th June 2007, 07:45 PM

Quote:

Originally Posted by psapg

NO, I wasn't planig on using Leds other that the opto-couplers, if I decide to go with them..

Any caution/example on using these as input to the PIC?

You could try checking my tutorials for some interfacing examples - but opto-couplers are VERY, VERY simpel to connect to a PIC (or any other logic device).

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24th June 2007, 05:26 PM	(permalink)
psapg	New to the Forum and to PIC's Hi guys!!!! Although I have some experience with electronic and it's basic theories, I've never worked with PIC's before... Now I'm willing to try and chose a "Garage opener" alike project.... My goal is to, by pressing a single press-button, a dc motor(6v or 12V) woul carrya a small load (about 50g) from A to B and Stop, and reverse in the next key press.... Since I do some programing in a Basic alike programing enviroment for the Windows Mobile Platform, I was planig in using PIC-Basic for the code.... What PIC shoul I use? (is 16c54 suited ?) Any related circuits I should peek? Should I use a H-Bridge for the motor? End-of-travel switch: micro-switch or opto-barrier? Thanks for all your incoming imput... Paulo Gomes

24th June 2007, 05:33 PM	(permalink)
eng1	The PIC16C54 is an OTP device. This means that it can't be re-programmed/updated after its first programming. Choose a flash-based PIC!

24th June 2007, 05:45 PM	(permalink)
psapg	Thanks, Eng1 Any suggestions? I believe I only need 5 I/O pins, 1 for the press button, one for each sposition sensor and two for the H-Bridge...

24th June 2007, 05:55 PM	(permalink)
eng1	Maybe you'll add some LEDs? I would consider a PIC16F628A.

24th June 2007, 06:34 PM	(permalink)
psapg	NO, I wasn't planig on using Leds other that the opto-couplers, if I decide to go with them.. Any caution/example on using these as input to the PIC?